character noun (MARK). âº grammar [C] a âletter, ânumber, or other âmark or âsign used in writing or âprinting, or the âspace one of these âtakes: This âcomputer âscreen is 66 characters âwide. (Definition of character from the Cambridge Academic Content Dictionary Â© Cambridge University Press).See all translations.haracter noun (MARK). âº grammar [C] a âletter, ânumber, or other âmark or âsign used in writing or âprinting, or the âspace one of these âtakes: This âcomputer âscreen is 66 characters âwide. (Definition of character from the Cambridge Academic Content Dictionary Â© Cambridge University Press). See all translations.
For the device intended to permanently remove one hair at a time, see Electric tweezers. Closeup of the head of an epilator. An epilator is an electrical device used to remove hair by mechanically grasping multiple hairs simultaneously and pulling them out. The way in which epilators pull out hair is similar to waxing, although unlike waxing, they do not remove cells from the epithelium of the epidermis. Aside from the spring in early spring-type epilators, there are no parts in epilators that require regular replacement.
Because it is very unreactive, helium is used to provide an inert protective atmosphere for making fibre optics and semiconductors, and for arc welding. Helium is also used to detect leaks, such as in car air-conditioning systems, and because it diffuses quickly it is used to inflate car airbags after impact. A mixture of 80% helium and 20% oxygen is used as an artificial atmosphere for deep-sea divers and others working under pressurised conditions. Helium-neon gas lasers are used to scan barcodes in supermarket checkouts.